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Finding the Fourth Proportional to 1,691.33, 2,536.99 and 1,688.90

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Solution

The fourth proportional to 1,691.33, 2,536.99 and 1,688.90 is: 2,533.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.33 : 2,536.99 = 1,688.90 : x
  2. Step 2: Convert to fraction form
    1,691.33/2,536.99 = 1,688.90/x
  3. Step 3: Cross multiply
    1,691.33x = 2,536.99 × 1,688.90
  4. Step 4: Simplify right side
    1,691.33x = 4,284,705.50
  5. Step 5: Solve for x
    x = 4,284,705.50/1,691.33
  6. Step 6: Final answer
    x = 2,533.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.